Filter division strip



United States Patent FILTER DIVISION STRIP Henry C. Cataldo,Springfield, N. 5., assignor to Filtration Engineers Incorporated,Newark, N. 3., a corporation of New York Application May 6, 1953, SerialNo. 353,382

1 Claim. (Cl. 210-199) This invention relates to drum typecompartmentized filters of the well-known type incorporating spaced,parallel division strips extending longitudinally of the drum surfaceand drainage members located between the strips.

The object of the present invention is to provide an improved type ofdivision strip and cooperating drainage member construction.

The preferred form of the invention is illustrated in the accompanyingdrawing, which is a cross-section of the portion of the periphery of adrum, omitting the usual pipes and other details having no relation tothe invention.

The division strips 1 are welded or otherwise suitably secured to theouter surface of the drum shell 2 and, as will be seen, incorporatealong their sides oppositely opening grooves 3, 4 disposed at diiierentdistances from the drum surface. More specifically, the strips are ofsubstantially S-shaped cross section, into which form they can be milledfrom bar stock or formed up from strip or sheet metal, as will beunderstood. The oppositely opening grooves are thus overlapped.

Cooperating with the strips are drainage members 5 which, as is wellknown, may consist of any one of a variety of suitable materials. Theindicated members Patented Nov. 22, 1955 may be formed, for example, ofmolded rubber; but, of whatever form or material, they are providedalong their opposite edges With flanges 6, 7 which are similarlydisposed to lie at different distances from the drum surface forinterlocking engagement with the correspondingly located division stripgrooves.

It will thus be seen that since both the drainage member flanges andtheir locating grooves are overlapped, the division strip can be quitenarrow and the dead area of the filter surface thereby reduced to aminimum. This is of particular advantage in connection, for example,with so-called string discharge filters in that it greatly facilitatesthe formation of a continuous cake.

In the light of the foregoing description, the following is claimed:

A drum type compartmentized filter, comprising the combination with adrum of a series of division strips secured to and extendinglongitudinally of the drum surface, each said strip incorporating alongits sides oppositely opening grooves disposed at different distancesfrom the drum surface, and drainage members arranged around the drumsurface intermediate the division strips, each said member having an endflange at each end, the end flanges of each member being likewisedisposed at different distances from the drum surface for interlockingengagement in the grooves of the division strips.

References Cited in the file of this patent UNITED STATES PATENTS959,979 Webb et a1. May 31, 1910 1,892,306 Hillier Dec. 27, 19322,381,635 Baker Aug. 7, 1945 2,534,161 Collins Dec. 12, 1950 FOREIGNPATENTS 416,485 Germany July 16, 1925

